Statement Of Changes In Equity [Abstract]

OSB Group PLC - Filing #1871267

Concept	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Issue of convertible instruments	—	—	—	—	—	—	—	—	—	—	—	– GBP	– GBP	150,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	15 0.0 GBP	– GBP
Purchase of treasury shares	1,300,000 GBP	– GBP	– GBP	1,300,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	500,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	500,000 GBP
Reduction of issued capital	—	—	—	—	—	—	—	—	—	—	—	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	1,3 55 .3 GBP	– GBP	1,355,300,000 GBP